Silver line to Wiehle-Reston, exit on the north side. There are escalators in the middle of the plaza there, inside a little covered area, that go down to the bus station underneath. Watch for the shitty metal flooring at the top of the escalators, though.. I've tripped and almost busted my ass several times. Take the 983 bus to U-H.

There's literally a metro station at DCA. Usually yellow or blue will take you there, but yellow is down right now for maintenance. Take the blue line.. if it says the destination is Franconia-Springfield OR Huntington, it will stop at DCA.